In a manner characteristic of or relating to Anabaptism; according to Anabaptist principles or practices.
From 'anabaptistical' + '-ly' (adverb suffix). This adverb form allows describing how an action was done or how a belief was held in the style or manner of Anabaptists.
Finding this word in historical texts reveals how writers could describe someone acting 'anabaptistically'—like refusing to fight in wars or rebaptizing converts—showing how English let people express complex religious positions with single adverbs.
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